Zenith SE2719P Audio Problem

[Tony Marsillo]

This TV is from 1988, and I realize may not be worth the effort but it is in
a very nice wood cabinet and belongs to my parents neighbor, who helps then
out allot. The problem is the audio will take about an hour after the set is
turned on before it will work. It comes on gradually, first some garbled
audio, that the audio seems to cycle at a one or two second rate in and out,
then comes on fine. I don't think it is a cracked solder joint because I
probed around during the warn up time with no luck. I don't have the service
info, but it looks like it is still available, and there is very little
markings on the board to help. What I am hoping is someone will remember if
this problem was a common failure and offer a clue. I have not pulled the
set yet because it is there main TV, they just turn it on in the morning and
it runs all day. The picture is still pretty good. I looked up the IC
numbers and some are still available.

Any help would be appreciated.
Thanks

 

[Jerry G.]

There are some thermo sensitive parts in the audio sections. Check mainly
for high ESR caps when the set is cold. You will need an ESR meter, or to
guess at the caps by changing them. Your lowest cost bet, would be to give
the set to an experienced service shop for this type of repair. If the CRT
and the rest of the set is working well, it most likely will be worth the
gamble.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
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WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
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This TV is from 1988, and I realize may not be worth the effort but it is in
a very nice wood cabinet and belongs to my parents neighbor, who helps then
out allot. The problem is the audio will take about an hour after the set is
turned on before it will work. It comes on gradually, first some garbled
audio, that the audio seems to cycle at a one or two second rate in and out,
then comes on fine. I don't think it is a cracked solder joint because I
probed around during the warn up time with no luck. I don't have the service
info, but it looks like it is still available, and there is very little
markings on the board to help. What I am hoping is someone will remember if
this problem was a common failure and offer a clue. I have not pulled the
set yet because it is there main TV, they just turn it on in the morning and
it runs all day. The picture is still pretty good. I looked up the IC
numbers and some are still available.

Any help would be appreciated.
Thanks